Tubular key



FIG. 1 is a perspective view of a tubular key showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view of a second embodiment thereof, the only difference residing in the configuration of the open tubular end;

FIG. 8 is a perspective view of a third embodiment thereof, the only difference residing in the configuration of the open tubular end. 

The ornamental design for a tubular key, substantially as shown and described. 